US3074858A - Method for the production of assemblies comprising titanium - Google Patents

Method for the production of assemblies comprising titanium Download PDF

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Publication number
US3074858A
US3074858A US18807A US1880760A US3074858A US 3074858 A US3074858 A US 3074858A US 18807 A US18807 A US 18807A US 1880760 A US1880760 A US 1880760A US 3074858 A US3074858 A US 3074858A
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Prior art keywords
titanium
graphite
platinum
etched
production
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Expired - Lifetime
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US18807A
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Riding Frank
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Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/38—Pretreatment of metallic surfaces to be electroplated of refractory metals or nickel
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/24—Halogens or compounds thereof
    • C25B1/26—Chlorine; Compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/60—Constructional parts of cells
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys

Definitions

  • the method for the N0 Drawillg- Filed 1969, 18,397 production of an assembly in which there is electrical Claims P y, pp f great England P 15, 1959 contact between titanium and graphite comprises pro- 6 Claimsviding the surface of the titanium to face the graphite
  • the present invention relates to improvements in or 10 t deposited f i g Of a platinum metal prior to relating to a method for the production of assemblies hnhglhg the tltehlum and graphite
  • 531d eleetrleal comprising titanium and particularly to a method for eohtaetthe production of assemblies involving contact between PYeteTah1Y S a1d Surface of t tltanlhm is etched P titanium and graphite as for instance in an interference to the depoeltloh Q the Platlhhm metal-
  • Proslstmg essehhally of tltahlhmlonged electrolysis at a high anodic current density has By Way of example the method of the If lhveh' shown furthermore no apparent change in the smooth be applied to a lhercury cell having an anode bright Surface of atitanium rod or anode 1 7.7 mches long of platinum coated expanded sheet Measurements of the electrical contact resistance up f clalmed Inter aha eopehdihg PP to very high contact pressures (3600 lb./in.
  • the object of the present invention is to provide a 40 in mlllivolts per ka./m. anodic current density. method of lowering electrical contact resistance between titanium and graphite in assemblies of titanium and Cup Without With hit platinum platinum
  • Experiments have therefore been carried out to measure the titanium to graphite electrical contact resistance g gg gg eg 2 at various contact pressures for titanium etched with anap lytical reagent quality concentrated hydrochloric acid for 4 days, similarly etched followed by rhodium electrm
  • These values show the marked superiority of the elecdeposition, similarly etched followed by platinum electrodeposlted Platinum coated titanium t0 graphite C011 trodeposition, similarly etched followed by five coats of tact as against a titanium t0 graphite Contact and 3150 a paint applied platinum-bearing preparation with the w that the Stamped P, Where the interference is fi i f each applied coat at 500 C and nometched maintained
  • An assembly for the passage of electrical current therethrough comprising a body of titanium, a surface of which has a platinum metal coating deposited thereon, a graphite body and means for maintaining said graphite body and said titanium body in 'electrical contact under pressure directly through said coating whereby the electrical contact resistance between 'said graphite body and titanium body is decreased.
  • an anode assembly comprising a body of titanium, a surface of which has a platinum metal coating deposited thereon, a graphite body and means for maintaining said graphite body and said titanium body in electrical contact under pressure directly through said coating whereby the electrical contact resistance between said graphite body and titanium body is decreased.

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  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)

Description

United 3 074 858 METHOD FOR THE PR ODiJCTION F ASSEMBLIES COMPRISING TITANIUM Frank Riding, Widnes, England, assignor to Imperial atent 3,074,858 Patented Jan. 22, 1963 ice Chemical Industries Limited, London, England, a cor- 5 an electrodeposit, of platinum or rhodium. poration of Great Britain According to the present invention the method for the N0 Drawillg- Filed 1969, 18,397 production of an assembly in which there is electrical Claims P y, pp f great Britain P 15, 1959 contact between titanium and graphite comprises pro- 6 Claimsviding the surface of the titanium to face the graphite The present invention relates to improvements in or 10 t deposited f i g Of a platinum metal prior to relating to a method for the production of assemblies hnhglhg the tltehlum and graphite Into 531d eleetrleal comprising titanium and particularly to a method for eohtaetthe production of assemblies involving contact between PYeteTah1Y S a1d Surface of t tltanlhm is etched P titanium and graphite as for instance in an interference to the depoeltloh Q the Platlhhm metal- Furthermore: fit preferably the platinum metal is electrodeposited on an Experiments using a laboratory cell producing chlorine etched Surface of tttflhhlmby electrolysis of brine have shown that it would be pos- Y the term f P Platlhhm metal 18 meant sible for example to design a titanium rod screw-fitting Plahhum, rhodtum, lndlum an alloy of two into a graphite anode or a graphite rod contacting a more of these Pe I titanium anode which would be satisfactory with regard 20 T tenth htahluhn {hchldes a tltahlum alloy to the voltage loss at the metal to graphite contact. Proslstmg essehhally of tltahlhmlonged electrolysis at a high anodic current density has By Way of exemple the method of the If lhveh' shown furthermore no apparent change in the smooth be applied to a lhercury cell having an anode bright Surface of atitanium rod or anode 1 7.7 mches long of platinum coated expanded sheet Measurements of the electrical contact resistance up f clalmed Inter aha eopehdihg PP to very high contact pressures (3600 lb./in. have non Senal 3 filed ruary 17, 1959, and shown however that at a contact pressure of even 3600 graphlte current lead'm rods; These rode can he 9 lb./in. the titanium-graphite contact resistance is about nficted to anode of hlatfmsed expanded sheet 2.5 times the graphite-graphite resistance at 25 lb./in. F by Welding to t tltamum F of h anode four Nevertheless in, for instance, the field of chlorine promanmm.cups of for Instance L240 mte.ma1 diamduction by electrolysis of brine it would be desirable, for eter whlch, accommodate the griphlte lead'm rods. by example, to be able to utilise titanium as a substitute for a I Interference and Whlch have h prqvlded the graphite at present used as current IeaMn rods on then lnner surfaces w1th an electredeposit of platmum. cause in titanium there is absence of porosity, it has By measiunng Potential drops i venous cutl'ehts the greater mechanical strength and electrical conductivity, contact resistance has been determined for both machined it has high resistance to corrosion by chlorinated brine cuPS ahd stamped P havlhg Parental and Shghtty and Wet chlorine gas and because it has an ability to verging sides respectlvely when the inner surface of these act as an insulator to an electrolyte whilst, at the same cups have and have an electfodeposlt of platthum' time, it is able to pass current to an electronic conductor. T F rechrded the tenowlhg table e expressed The object of the present invention is to provide a 40 in mlllivolts per ka./m. anodic current density. method of lowering electrical contact resistance between titanium and graphite in assemblies of titanium and Cup Without With hit platinum platinum Experiments have therefore been carried out to measure the titanium to graphite electrical contact resistance g gg gg eg 2 at various contact pressures for titanium etched with anap lytical reagent quality concentrated hydrochloric acid for 4 days, similarly etched followed by rhodium electrm These values show the marked superiority of the elecdeposition, similarly etched followed by platinum electrodeposlted Platinum coated titanium t0 graphite C011 trodeposition, similarly etched followed by five coats of tact as against a titanium t0 graphite Contact and 3150 a paint applied platinum-bearing preparation with the w that the Stamped P, Where the interference is fi i f each applied coat at 500 C and nometched maintained throughout insertion of the graphite lead-in treated with 20 coats of the same platinum-bearing preprod, 15 the better designti ith th fi i f h coat li d at 500 C, Similar results are obtained on passing the current in In the following table there is recorded the results obthe pp direction titanium t0 graphite) inditained for variations of titanium to graphite contact eating the absence of y rectifying P p resistance in ohms-cm. with contact pressure at room What I claim is; temperature. 1. A method for the production of an assembly in Paint Paint Electro- Electro- Etched applied applied deposited deposited Contact pressure Graphite Titanium titanium platinum platinum rhodium platinum -I1 t0 '0 to on etched on nonon etched on etched graphite graphite graphite titanium etched titanium titanium to titanium to to graphite to graphite graphite graphite -coated titanium and graphite into said electrical contact.
2. A method as claimed in claim 1 wherein said surface of the titanium is etched prior to the deposition of the coating of a platinum metal.
3. A method as claimed in claim 2 wherein the coat- "ing of platinum metal on the etched surface of titanium is elfected by electrodeposition.
4. An assembly for the passage of electrical current therethrough, said assembly comprising a body of titanium, a surface of which has a platinum metal coating deposited thereon, a graphite body and means for maintaining said graphite body and said titanium body in 'electrical contact under pressure directly through said coating whereby the electrical contact resistance between 'said graphite body and titanium body is decreased.
5. The assembly of claim 4 wherein said titanium member'is a cup, the inner surface of which is provided with said coating and said graphite member is a rod fitted into said cup for electrical contact.
'6. In a mercury cell, an anode assembly comprising a body of titanium, a surface of which has a platinum metal coating deposited thereon, a graphite body and means for maintaining said graphite body and said titanium body in electrical contact under pressure directly through said coating whereby the electrical contact resistance between said graphite body and titanium body is decreased.
References Cited in the file of this patent UNITED STATES PATENTS 2,624,772 Phillips Jan. 6, 1953 2,631,115 Fox Mar. 10,1953 2,636,856 Suggs et al Apr. 28, 1953 2,829,091 Missel Apr. 1, 1958 2,873,233 Schnable Feb. 10, 1959 OTHER REFERENCES Chemical Age, Jan. 3, 1959, page 9.

Claims (1)

1. A METHOD FOR THE PRODUCTION OF AN ASSEMBLY IN WHICH THERE IS ELECTRICAL CONTACT BETWEEN TITANIUM AND GRAPHITE WHICH COMPRISES PROVIDING THE SURFACE OF THE TITANIUM TO FACE GRAPHITE WITH A DEPOSITED COATING OF A PLATINUM METAL AND THEREAFTER BRINGING THE PLATINUMCOATED TITANIUM AND GRAPHITE INTO SAID ELECTRICAL CONTACT.
US18807A 1959-04-15 1960-03-31 Method for the production of assemblies comprising titanium Expired - Lifetime US3074858A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12768/59A GB881625A (en) 1959-04-15 1959-04-15 Improvements in or relating to a method for the production of assemblies comprising titanium

Publications (1)

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US3074858A true US3074858A (en) 1963-01-22

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US (1) US3074858A (en)
CH (1) CH453313A (en)
DE (1) DE1421369A1 (en)
ES (1) ES257296A1 (en)
FR (1) FR1254315A (en)
GB (1) GB881625A (en)
NL (2) NL250202A (en)
SE (1) SE213197C1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242059A (en) * 1960-07-11 1966-03-22 Ici Ltd Electrolytic process for production of chlorine and caustic
US3278410A (en) * 1962-05-01 1966-10-11 Edwin M Nelson Electrolytic anode
US3601784A (en) * 1969-06-16 1971-08-24 Francis N La Martine Battery terminal
US4330376A (en) * 1979-03-05 1982-05-18 Atlantic Richfield Company Process for inhibiting titanium corrosion

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624772A (en) * 1947-09-15 1953-01-06 Aluminium Lab Ltd Electrical contact between aluminum and graphite
US2631115A (en) * 1949-08-06 1953-03-10 Manganese Battery Corp Electrodes for electrochemical cells
US2636856A (en) * 1948-06-29 1953-04-28 Mallory & Co Inc P R Electrode for electrochemical oxidation
US2829091A (en) * 1956-06-04 1958-04-01 Menasco Mfg Company Method for electroplating titanium
US2873233A (en) * 1956-03-21 1959-02-10 Philco Corp Method of electrodepositing metals

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624772A (en) * 1947-09-15 1953-01-06 Aluminium Lab Ltd Electrical contact between aluminum and graphite
US2636856A (en) * 1948-06-29 1953-04-28 Mallory & Co Inc P R Electrode for electrochemical oxidation
US2631115A (en) * 1949-08-06 1953-03-10 Manganese Battery Corp Electrodes for electrochemical cells
US2873233A (en) * 1956-03-21 1959-02-10 Philco Corp Method of electrodepositing metals
US2829091A (en) * 1956-06-04 1958-04-01 Menasco Mfg Company Method for electroplating titanium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242059A (en) * 1960-07-11 1966-03-22 Ici Ltd Electrolytic process for production of chlorine and caustic
US3278410A (en) * 1962-05-01 1966-10-11 Edwin M Nelson Electrolytic anode
US3601784A (en) * 1969-06-16 1971-08-24 Francis N La Martine Battery terminal
US4330376A (en) * 1979-03-05 1982-05-18 Atlantic Richfield Company Process for inhibiting titanium corrosion

Also Published As

Publication number Publication date
CH453313A (en) 1968-06-14
GB881625A (en) 1961-11-08
DE1421369A1 (en) 1968-10-24
FR1254315A (en) 1961-02-17
NL110254C (en)
SE213197C1 (en) 1967-05-30
NL250202A (en)
ES257296A1 (en) 1960-07-01

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